Since the input of the Solar Home Lighting System is the most unstable, it is generally necessary to configure the battery system to work. There are generally lead-acid batteries and colloidal batteries.
The choice of battery capacity generally follows the following principles: First, the energy of the solar module during the day is stored as much as possible under the premise of meeting the night illumination, and at the same time, it is necessary to store the electric energy required for the night and night of the rainy day. If the battery capacity is too small, it can not meet the needs of night lighting. The battery is too large. On the one hand, the battery is always in a deficient state, which affects the battery life and causes cost waste. The battery should match the solar battery and the electrical load (street light).
A simple way to determine the relationship between them. The Solar Street Light cell power must be more than 4 times higher than the load power for the system to work properly. The voltage of the solar cell should exceed 20~30% of the working voltage of the battery to ensure that the battery is normal. The battery capacity must be more than 6 times the daily load of the load.